Oakley makes eyewear good enough for people who commute at three times the speed of sound. So its only natural that they sculptured a frame with aviator styling. C-5 alloy keeps it lightweight and comfortable, and supple Unobtainium components increase grip with perspiration. It also offers 100% UV filtering and impact resistance that meets all ANSI Z80.3 standards. But the best thing about the Crosshair is something pilots insist on, along with everybody else who takes their vision seriously: the unbeatable clarity of High Definition Optics (HDO).